Smoke-consuming furnace



(No Model.)

s. T. ARMSTRONG. SMOKE GONSUMING PURNAUB.

No. 517,324. Patented Mar. 27, 1894.

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UNrTs STATES PATENT OFF.

SHUBAEL ARMSTRONG, OF SYOAMORE, ILLINOIS, ASSIGNOR OF ONE-TENTH TO FRED A. COLE, OF PLYMOUTH, MICHIGAN..

SMOKE-CONSUMlNc.l FURNACE.

l SPECIFICATION forming' part 0f Letters Patent No. 517,324, dated March 27, 1894.

' Application filed April 13, 1893. Serial No. 470.145. (No modell) To all whom it may concern: Y

Beitknown that I, SHUBAEL T. ARMSTRONG, a citizen of the United States, residing at Sycamore,in the county of De Kalb, State of Illinois,have invented certain new and useful Improvements in Smoke-Consuming Furnaces; and I do declareV the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art ro to whichl it appertans to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

r 5 This invention relates to smoke consuming re pots, and consists in a certain constructionv and arrangement of parts as hereinafter fully set forth, the essential features of which being pointed out particularly in the claims.

2o' The object of theinvention is to produce a iire-potin which the construction is such as to insure a more complete combustion, and the consumption of the carbon and gases i liberated from the burning coal. This object z 5 is attained by the device illustrated in the accompanying drawings, in which- Figure lis an elevation of my improved firepot or furnace, the front wall being broken away to show the arrangement of parts. Fig.

3o 2 is a transverse section through the tire-pot and dampers. Fig. 3 is a plan of the fire-pot and its reversible damper or cover. Fig. 4 is a vertical section on line 4-4 of Fig. 2.

Referring to the letters of reference,A.and

3 5 B designate two-independent divisions of tlfe fire-pot, separated by the adjacent partitions b, d, which form a iiue a between their opposed faces. Saidv divisions are each provided with a grate O, and below each grate is 4o an ash-pit D.

E designates a reversible damper, having a cylindrical head F, which is journaled in the frame, slightly above and between the divisions of the firepot, and extending from said head, through the front wall, is a shaft f, having a square end for the application of a crank, with which to aetuate said damper. The form and location of the damper E are such, that, by means of its reversible feature,

5o it may be made to alternately cover and close the top of each of the divisions. Said damper being provided on each side with a right angle ange c, adapted to fit overthe upper edges of said divisions of the fire-pot, and may be made to set in a groove, to more perfectly prevent the escape of gas when the damper is closed. The cylindrical head of the damper is hollowed out, on opposed sides, between the circular ends h thereof, as shown at o, leaving a solid central portion which extends the 6c entire length of the fire-pot, and from which the body portion E of the damper proceeds, as clearly shown in Fig. 2. The partitions d and I) do not extend to the top of the fire-pot, but terminate some distance below the top thereof, at a point where their vertical line intercepts the circumference of the head F. By which arrangement, when the damper E is in the position shown in Figs. l and 2, the

into divisionB above the portion d, and communication is established between the division A and the central flue a through the concavity in one side of said head. It will alsoy be understood in this connection, that, by reversing said damper to the top of division B, as shown by dotted lines, communication will be established between division B, and the flue a through the concavity in the opposite side of said head, and the solid portion of the 8o head willatjthe same time close the opening into division A, above the partition b.

H designates a lever pivoted on the shaft I. The upper end of said lever extends into the path of thesolid portion of the head F, and the lower end thereof is bifurcated and sits astride of the upper edge of the lower damper J, which extends the length of the fire-pot and is pivotally mounted, so that it may be alternately swung against the lower 9o edge of the partitions d, b of the respective divisions of the re-pot.

The operation of the device is as follows With the parts in the position shown in Fig. l, the fire is started on the grate in division B, the top of which being open aords direct communication with the stack (not shown). When the re so started has burned to a glow or incandescent heat, a fire is started upon the grate in division A, the damper in roo door K is opened, and that in door L nearly closed, by which means the carbon and gases generated by the initial burning of the fuel in division A of the pot, are conveyed out through the opening in the damper head F, down through the dividing ilue a, and upward through the glowing fire in division B, in the intense heat of which said smolce and gases are consumed, the carbon and gases before passing through the fire, being mixed with the air which enters in sufficient quantity through the partially closed damper in door L, to insure combustion. When the re in division A has burned to a red heat, fresh fuel is added to the fire in division B, the damper in door L opened, and the one in door K nearly closed. The damper E is then reversed to the dotted position shown in Fig. l, closing the top of division B, and opening communication between said division and the flue a, and actuating the lever H to throw the free edge of damper J against the partition CZ, whereby, the smoke and gases from the freshly burning fuel in division B, are conveyed downward through the central iiue a, and are passed up through the incandescent heat of the fire on the grate in division A, and thus in succession, the fuel is alternately supplied to the respective divisions of the fire-pot, and the smoke and gases therefrom are consumed by being passed through thc intense heat of the iire in the adjoining division. 'lhe sides of the fire-pot heat the flue to a high temperature, so that in passing therethrough the carbon is expanded and rendered more readily combustible.

Having thus fully set forth my invention, what I claim as new, and desire to secure by Letters Patent, is-I l. In a furnace, in combination with the divisions of the fire-pot normally open at their top, of the reversible damper pivoted between said divisions and adapted to swing from one division to the other and successively close the tops thereof.

2. In a furnace, the combination with the divisions of the re-pot forming the central flue between them, of the reversible damper having the concaved head and adapted to alternately close thetop of said divisions and at the same time establish communication through said head between said central fiue and the division closed.

3.@In a, furnace, the combination of the adjacent divisions ofthe re-pot forminga iiue between them, the reversible damper adapted toalternately close the topof said divisions,

and at the same time establish communication between the closed division and said Hue, and close the communication between said flue and the open division.

e. In a furnace, the combination of the adjacent divisions of the fire-pot forming the vertical flue between them, the lower end of which flue normally communicates with the space belowr the grates of said divisions, the upper reversible damper adapted to alternately close the top of said divisions of the fire-pot, and at the same time establish communication with the respective divisions in reciprocal succession, the lower damper adapted to successively open and close the communication between the central iiue and the space below the grates of said divisions, and means connecting said dampers so that they may operate simultaneously to pass the smoke and gases from one division through the fire in the other, and viceversa,substan tially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

SHUBAEL T. ARMSTRONG.

Witnesses: p

Ill. S. EARLEY, ELLEN E. DERRICK. 

